linux-kernel - Re: How to create IRQ mappings in a GPIO driver that doesn't control its IRQ domain ?

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Message-ID: <20130725135319.GF9858@sirena.org.uk>
Date:	Thu, 25 Jul 2013 14:53:19 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: How to create IRQ mappings in a GPIO driver that doesn't control
 its IRQ domain ?

On Thu, Jul 25, 2013 at 03:21:35PM +0200, Linus Walleij wrote:
> On Thu, Jul 25, 2013 at 3:15 PM, Mark Brown <broonie@...nel.org> wrote:

> > Are the interrupts in a contiguous block in the controller so you can
> > just pass around the controller and a base number?

> That works with platform data and in-kernel structures, but AFAICT
> device tree has no such "bulk" concept but expects you to list
> each and every line individually in cases like this.

It works fine with domains as well - the domains all have a hwirq number
which is local to the domain context and doesn't correspond to a Linux
interrupt number.  If you can say "the X interrupts in this domain
starting at Y correspond to these X GPIOs" then you should be able to
cope.  Hopefully.

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